Man, I feel your pain on this one. 'Tsuki ga Michibiku' is kind of a nightmare to track legally in English, honestly. I ended up going straight to the Japanese publisher's site, Alphapolis, and using a machine translation overlay because the fan translations are so all over the place.
Some aggregator sites claim to have the latest, but the chapters are often mislabeled or from a different version of the story entirely, which drove me nuts. If you're willing to pay, BookWalker Japan has the official Japanese e-books, but you need an account set to the Japanese storefront.
Honestly, the fan-translated scene for this series is in a weird limbo. A group was doing it consistently, then they vanished, then someone else picks it up months later. I've had better luck finding discussion threads on places like NovelUpdates that link to the translator's personal blog when they're active. It's less of a 'where to read' and more of a 'who's translating it this week' situation.